Xavier Remington 
Yes they can advance to the level of Sorcerer with a Wizardry step along the way. Although it’s usually only the wicked witches who do so. This is due to the fact that good witches tend to not want to give up their Wicca beliefs and their beloved Goddesses who grant them power. They would rather finely hone their craft and be one with nature in communion its deities. In the end an extremely talented witch can defeat a novice sorcerer! Advancement to the level of sorcery is usually only considered when a grave future danger is gleamed in a psychic vision or scrying session.
Wicked witches on the other hand could care less about nature or anyone they worship for power. They’ll even toss their demon masters aside if they can get away with it! These dark misguided individuals will do anything to acquire more power in their quest to corrupt the planet and destroy humanity! Thankfully Sorcerers are rare since it takes an amazing level of mental power to be in the upper most echelon of magic practitioners. Magicians who call upon the pure energized essence of the Universe rather than higher dimensional beings for power. Ultimately Sorcerers look inward to derive their own enchanted energies.
Related Blog Post: What’s The Difference Between Witches, Warlocks, Wizards & Sorcerers?
How do the practitioners of magic you guys encounter able to shot magic from there hands,rise the dead,etc.
If their magic is low level?
do they get it from books?
do they get it from demons and/or higher beings?
Just about every person who has such amazing powers are either born with the specific power, or are hereditary practitioner of magic. I was born the power to produce the Mystic Sphere. To temporarily acquire other powers I call upon Goddesses, and sometimes Gods as well. Those into black magic call upon demons. After utilizing a power many times it can build up allowing you to not have to call upon anyone to access it. For instance I can shoot lightening from my hands with a simple phrase rather than going through a whole spell. If I keep using it constantly it could become apart of my DNA, and I could pass it on as an active power to future generations.
Even as a hereditary witch it takes some time to acquire Goddess support, and manifest various powers. My mother taught me the craft, and I later attended magic school where I indeed studied many mystical texts at the request of my professors. Those not born with magical genes usually never get to this level of magic. Although it’s not unheard of for a normal human to become a full fledged witch, or wizard.
I really don’t know